She's been walking now for about 6 months and is pretty stable so I don't think it's that. She's eating beans, yogurt, BM and I hide pureed meat in her food too so she should be getting enough protein but she's such a small eater, I often wonder about the quantities.
But funny you mention psoriasis. I've had it in the past but not too serious. And dd had dry ecxema (sp?) like cracks in her toes a few months ago. I had that as a child too. I'd been putting Eucarin cream on that and keeping socks on her and it healed the skin, so I stopped doing about a month or two ago. I think I'll start putting it on again and see if it helps.